Highly reliable optical data system

Details Highly reliable optical data system Highly reliable optical data system

H - Electricity

04

B

H04B 10/20 (2006.01) H04B 1/74 (2006.01) H04B 10/18 (2006.01) H04B 10/207 (2006.01) H04J 3/06 (2006.01) H04L 12/44 (2006.01)

Patent

CA 2087015

- 17 - Abstract Highly reliable optical data network, in which data are exchanged between an active central unit (CU1) and subscriber line units (DU1, DU2, DU3, ...) using the time-division multiplexing method. The reliability is considerably enhanced by parallel connection of a back-up central unit (CU2). In order to permit a disruption-free switchover between the central units (CU1, CU2), the latter have controllable delay devices (TDL1, RDL1, TDL2, RDL2), so that the delays of the signals to and from the subscriber line units (DU1, DU2, DU3, ...) can be matched with the aid of a special line unit(SDU).

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